What is the difference between Office 365 ProPlus and Office Professional Plus?

Both Office Professional Plus (latest version) and Office 365 ProPlus deliver the same productivity software, application experiences and similar licensing models (i.e. per subscriber). Office O365 Pro Plus though, is seen as an endpoint software (with 5 install rights) whereas Office Professional Plus under SPLA is more ideal for hosted solutions, especially in a multi-tenanted environment.